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dxa: Make sure the reference frame exists

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit 5ef7c84a93)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Conflicts:
	libavcodec/dxa.c
This commit is contained in:
Luca Barbato 2013-08-14 16:51:53 +02:00 committed by Sean McGovern
parent 91355bec88
commit 86c169c5b6
1 changed files with 6 additions and 0 deletions
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6
libavcodec/dxa.c
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@ -255,6 +255,12 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
case 5:
c->pic.key_frame = !(compr & 1);
c->pic.pict_type = (compr & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
if (!tmpptr && !c->pic.key_frame) {
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
return AVERROR_INVALIDDATA;
}
for(j = 0; j < avctx->height; j++){
if(compr & 1){
for(i = 0; i < avctx->width; i++)